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Graphene as an efficient sorbent for the SPE of organochlorine pesticides in water samples coupled with GC–MS
Author(s) -
Han Qiang,
Wang Zonghua,
Xia Jianfei,
Xia Linhua,
Chen Sha,
Zhang Xiaoqiong,
Ding Mingyu
Publication year - 2013
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201300373
Subject(s) - elution , sorbent , graphene , chemistry , chromatography , cartridge , analyte , adsorption , detection limit , sample preparation , gas chromatography , stacking , organochlorine pesticide , environmental analysis , solid phase extraction , pesticide , environmental chemistry , materials science , nanotechnology , organic chemistry , agronomy , metallurgy , biology
The determination of organochlorine pesticides in water samples, which are harmful to humans, is very important for environmental risk assessment. Based on the excellent adsorption properties of graphene, an SPE coupled with GC–MS method for the monitoring of organochlorines (four hexachlorcyclohexanes and four dichlorodiphenyltrichloroethanes) was developed. Owing to the hydrophobic interaction and π–π stacking interaction between the analytes and graphene, the analytes quantitatively adsorbed onto the graphene‐based SPE cartridge were eluted by ethyl acetate for analysis. Several parameters influencing the analytical performance, such as the kind of elution, sample volume, reusability of the cartridge, have been investigated in detail. Under the optimal conditions, detection of limits of 1.95–9.38 ng/L, recoveries of 83.9–107.3% at two spiked concentration levels (0.1 and 10 ng/mL) and RSDs in the range of 2.9–7.4% for real water samples were obtained for all the analytes. This work reveals the great potential of graphene in sample preparation procedures.